Heading and like machine



Nov; 24, 1953 A, WATT 2,659,906

HEADING AND LIKE MACHINE Filed June 19, 1952 4 Sheets$heet 1 FIG.

INVENTOE Nov. 24, 1953 WATT 2,659,906

HEADING AND LIKE MACHINE Filed June 19, 1952 4 Sheets-Sheet 2 INVENTOKa& Hu Alzaf BY MWSBw AW Nov. 24, 1953 WATT 2,659,906

' HEADING AND LIKE MACHINE File d June 19, 1952 v 4 Sheets-Sheet 5 kg mo :1 m l ba 8 8 xBY" 1 AGENTS V Nov. 24, 1953 A. B. WATT $659 906HEADING AND LIKE MACHINE Filed June 19, 1952 4 Sheets-Sheet 4 v INVENTOEI g I BY W QM QMM i AENTG Patented Nov. 24, 1953 HEADING AND LIKEMACHINE Alexander Basil Watt, Handsworth, Birmingham, England, assignorto G. K. N. Group Services Limited, Smethwick, England, a British com-Application June 19, 1952, Serial No. 294,434

6 Claims.

i This invention relates to heading and like machines of the kind havinga body in the face of which is an opening containing a die into whichthe work is fed, and a reciprocating ram having a head upon which ismounted a movable punch carrier carrying two spaced punches, the carrierbeing movable transversely to the movement of the ram so as to make itpossible to bring the punches into action alternately, automatic meansbeing provided for so moving the carrier. In such machines the punchesmay be shaped to form a head upon the work, or to form a recess in theend of the work, and the operation is unusually carried out at roomtemperatures.

Hitherto in such machines the means for producing the transversemovement of the carrier has included a spring-loaded block sliding in aslot in an oscillating lever. In such mechanism the friction between thesliding block and the slot in the lever in the course of time produceswear, with the result that the machines have to be taken out of servicefrom time to time for repair. Further in such mechanism the stressesapplied to some of the working parts are bending stresses so that theseparts have to be of robust and relatively heavy construction. In theconstruction in accordance with the present invention the stressesapplied to the working parts are mainly in the form of tension orcompression with the result that such parts can be of lighterconstruction than hitherto thus enabling the machine to be driven at ahigher speed than is the case with existing constructions.

The object of the present invention is to provide improved automaticmeans for producing the transverse movement of the carrier.

According to the present invention the transverse movement of thecarrier is produced by mechanism including a floating member which ismoved by a pair of parallel links of equal length, the floating memberbeing connected to the ram and to the carrier, or to carrier-actuatingmechanism by further links, the parallel links being operable at anyposition of the ram to move the carrier from one end of its travel tothe other. Such movement takes place dur ing the periods when thepunches are not in engagement with the work.

Further, the mechanism for producing the movement of the carrier maycomprise a floating member to which are pivoted a pair of primary linksand a pair of secondary links all operating in the same or parallelplanes at right angles to the face of the body and parallel to thedirection of movement of the ram, the two primary links being of thesame length and being parallel'to each other, one of the primary linksbeing pivotally connected to the carrier, or to carrieractuatingmechanism, and the other being pivoted to the ram, the two secondarylinks being of the same length and being parallel to each other andpivoted to the floating member at one pair of ends, and the other end ofone of them being pivotally mounted at a'fixed point and the other endof the secondary line being pivoted to a lever which is caused tooscillate about the said fixed point. With this arrangement the carriercan be moved from one position to the other at any position of the ramby turning the lever.

Stops may be provided on the head adapted to be engaged by a projectinglug on the carrier at each end of its movement.

The invention is illustrated in the accompanying drawings wherein:

Figure 1 is a section in side elevation of one type of heading machineembodying the present invention.

Figure 2 is a section on the line 2-2 in Figure 1.

Figure 3 is a view of the head of this type of machine showing amodification.

Figure 4 is a section in side elevation of another type of headingmachine embodying the present invention.

Figure 5 is a section on the line 5-5in Figure 4.

Figure 6 is a view showing the mechanism of Figure 4 in the otherextreme position.

Figure 7 is a section on the line '|-1 in Figure 6. f v

In the constructions shown in Figures 1 to 3 the body, die, ram and headare constructed as usual, the body ID having a die H with an opening l2into which the stock is fed and the, ram [3 being mounted in guides. H!for reciprocation by crank and pitman 15 from the shaft 16.. The carrieris in the form of a slide I! mounted for rectilinear reciprocatingmovement on thehead [8 of the ram. t

The operating mechanism for producing the reciprocating movement of theslide H incorpo rates a floating member IS which may be formed as ametal plate, or may be fabricated, and which may be of approximatelytriangular shape as shown, although this is for convenience only, theactual shape of the plate being of no major importance as regards theworking of the mechanism.

The head I8 of the ram is provided with a projecting lug 26 and theslide ll is also provided with projecting lugs 2| and these lugs arecon- 3 nected to the floating member [9 by a pair of spaced links 22 and23, which are of the same length. In the construction of Figure 1 theselinks are pivotally connected at one pair of ends to the said lugs andat the other pair of ends to the floating member l9 and are parallel.

In the alternative construction shown in Figure 3 these two links, whichare the primary links, are connected by a third link 24 pivotallyconnected between the ends of the primary links which are adjacent tothe head andslide, andin this arrangement a third link 25 is pivoted atone end to the lug 2| on the slide and at the opposite end it is pivotedto the primary link 2-3.

In both constructions the floating member it is moved by a pair ofsecondary links 26 and 2'? which are always parallel and are of. thesame length, and one of these links, namely 28, is pivoted to a fixedbracket 28 upon which is pivoted, about the same axis, a control lever29 to which'is-alsc. pivoted the other of these secondary links, namely21. The control lever 29 isoscillated by providing its opposite end witha roller 30- which engages a rotating cam 3|, the roller 30 being keptin contact with the periphery of the cam 3'! by suitable spring means,such as spring 3-2 acting onthe arm 33 fixed onthe pivotalaxis 34.

The cam is fixed upon a shaft 55 on which isfixed a gear wheel 35meshing with a gear wheel 31. on the shaft l6; the ratio between thesewheels being 2:1.

The operation of the mechanism is as follows: commencing from theposition shown in Figure l the roller 30 travels the dwell portion 38whilst the ram moves from right to left and the upper punch 35engagesthe. stock in the die I l. On the return stroke the rise portion5'0 of cam 3! causes the link mechanism to move the punch slide llvertically so that the lower punch ll is brought intoline with the diefor the next forward (right to left.) stroke when the roller 35travelsthe dwell portion 42. On the next return stroke the roller 30'travels thefall portion of cam 3i and the link. mechanism returns theslide to its original position.

Limiting stops 43 are preferably provided on the head l8 to be engagedby a lug M on the slide I1 and there may also be positioning means,such: as generally indicated at 45.

In the construction shown in Figures 4 to '7, the invention is shownapplied to a heading machine of the type in which the punches aremounted in a carrier which is rotated about an axis parallel to thedirection of reciprocating of the ram.

tobringthe punches alternatively into the operative position. Thearrangement of the body, die, ram: and ram operating mechanism is thesame as in the previous construction but in this construction the punchcarrier 45, carrying the. punches 41 and 48: is mounted on the end of awhich meshes with a bevel gear 58 on the end of the shaft 49. The linkmechanism is similar to that shown in the previous construction and comiprises a floating member 59 to which are connected the primary links 60,BI and the secondary links 62, 63.

A lever 64 is fixed to the end of shaft 55 and the link 6| is pivotallyconnected to the end of said lever. The other link 60 is pivotallyconnected to the end of shaft 55. The mechanism is operated as before bya cam and the movement of the mechanism caused by the cam causesoscillation of the shaft 49 so as to bring the punches 47, 48,successively into the operative position for acting on the stock whichis in the die. Figure 4 shows the mechanism in one extreme position atthe beginning of a forward stroke of the ram and Figure 6 shows themechanism in the other extreme position at the beginning: of the nextforward stroke, the shaft 49 having been turned to bring the other punchinto the operative position.

In either construction the movement of the carrier in one direction maybe produced by the action of spring means as shewn or alternatively acam may be used having a groove on its periphcry or face for producingthe movement inboth directions. In a further alternative two cams may beused, one producing it in the reverse direction.

What I claim then is:

1. In a heading machine of the kind having a die through which stock isfedand a reciprocating ram having a head'upon which is mounted a movablepunch carrier carrying two spaced punches, the carrier being movabletransversely to the direction of movement of' the rain to bring thepunches into action alternately; mechanism for moving the carriertransversely comprising, a member mounted for floating movement, a pairof primary links, parallel and of equal length, one connecting saidfloating member to the ram and one connecting said floating memher tothe punch carrier, a pair of secondary links, parallel and of equallength acting at one pair of ends on said member and operating meansacting on the other pair of ends of said parallel links said operatingmeans being driven in timed relationship with the reciprocation of theram tocause periodic movement of the punch carrier from one end of itstravel to the other.

2.v In a headingv machineof the kind having a die through which stock.is fed. anda reciprocating ram having a head. upon which is mounted amovable punch carrier carrying two spaced punches, the carrier being.movable transversely to the direction of. movement of the rain to bringthe punches into. action alternately; mechanism for moving the carriertransversely comprising, a member mounted forfloatingv movement, a pairof primary links anda pair of secondary links, said links beingdisposed. in the. same or parallel planes all parallel to the directionof movement of the ram, the twoprimary links being of equal length andparallel. to each. other. and being pivotally connected atone pair ofends to said floating member, at the other end, one primary link beingpivotally connected to: the carrier and the other being pivotallyconnected to the ram, said two secondary links being of. equal lengthand parallel to each other. and pivotally connected to the floatingmember at one pair of ends, at the other end, one of' said secondarylinks being pivotally mounted at a point fixed in relation tothe fixedparts of the machine, an operating. lever pivotally connected to theother secondary link. at this other end and means for causingoscillation of said: operating lever about 5 the axis of said fixedpoint in timed relationship with the reciprocation of the ram.

3. A heading machine according to claim 2 wherein the operating lever ismoved by means of a rotatable cam which is driven in timed relationshipwith the reciprocation of the ram.

4. A heading machine according to claim 2 wherein the carrier is in theform of a slide mounted on the head of the ram for reciprocation thereonin a direction at right angles to the direction-0f movement of the ram,one of the primary links being pivotally connected to the head of theram and the other being pivotally connected to the slide.

5. A heading machine according to claim 2 wherein the carrier is in theform of a slide mounted on the head of the ram for reciprocation thereonin a direction at right angles to the direction of movement of the ram,one of the primary links being pivotally connected at one end to thehead of the ram, the other primary link being pivotally connected at oneend to one end of a link the other end of which is pivotally connectedto the slide and a further link pivotally connected at its ends to thesaid ends of the primary links.

6. A heading machine according to claim 2 wherein the carrier is mountedon the end of a shaft which is rotatably mounted in or on the ramparallel to the direction of movement of the ram, said shaft beingadapted to be oscillated by a further shaft carried by the ram one ofsaid primary links being pivoted at one end on said further shaft andthe other primary link being pivotally connected to one end of a leverthe other end of which is fixed to said further shaft.

ALEXANDER BASIL WATT.

References Cited in the file of this patent UNITED STATES PATENTS Number

